General 2002 fiat Ducato 2.8 jtd turbo

[Benimardriver]

Hi does anyone know if 2002 Ducato 2.8jtd has a turbo solenoid valve controlling the waste gate actuator and where it’s located if fitted . Thanks
Also what is worst that can happen if the actuator doesn’t move from the closed position

 

[Communicator]

You have it the wrong way round. The 2.8jtd turbo pressure control system is autonomous. The compressor output is tapped and fed the control capsule which is operated by pressure not vacuum. The wastgate starts fully closed, and opens so as to limit the maximum boost pressure.
If the wastgate sticks and remains closed then the engine could over boost and be damaged.

I am attaching a photo of the turbo on my 2.8jtd. The tapping on the compreeor is clearly visible, but the connection to the control capsule is hidden behind one of the gear selection cables.

 

[Benimardriver]

Thanks that’s correct and very helpful photo .

 

[Benimardriver]

You have it the wrong way round. The 2.8jtd turbo pressure control system is autonomous. The compressor output is tapped and fed the control capsule which is operated by pressure not vacuum. The wastgate starts fully closed, and opens so as to limit the maximum boost pressure.
If the wastgate sticks and remains closed then the engine could over boost and be damaged.

I am attaching a photo of the turbo on my 2.8jtd. The tapping on the compreeor is clearly visible, but the connection to the control capsule is hidden behind one of the gear selection cables.

I
Would you know what pressure the waste gate actuator operates at ? I have a pressure gauge and would like to check the flexible sense line is not leaking

 

[Communicator]

I
Would you know what pressure the waste gate actuator operates at ? I have a pressure gauge and would like to check the flexible sense line is not leaking

From an old thread, which quotes 1.4 Bar from the "Workshop Manual". Did this mean eLearn? Hi all... as I have written in a previous post I have bought a 2002 ducato motorhome... The car is fitted with the 2.8 JTD and runs well, exept from in 5.th gear, where it cant hold much over 90 kph. or 55 mph on straight road... I therefore consider a tuningbox to "reclaim" the 5th gear, but before I fit one I would like lo know if the turbo produces the pressure it should. Does anyone know where I connect the boost gauge? I have been looking in the workshop maual, but there they explain it as a procedure with electronic special tools needed. I would like to just fit a boost gauge, and keep an eye on it as I do the testdrive. As I could understand from the workshop manual the maximim pressure should be 1.4 bar. Different values according to where you look.! From Fiat eLearn (Seebold figure at end.)​

Fit the tool 1.870.737.000 between the air hose and the air chamber. Connect the pressure transducer to the tool. Position the diagnostic equipment in the passenger compartment and make the connections. Select "pressure gauge" on the diagnostic equipment and prepare for the acquisition of data in "intake pressure" mode with a 2000 mmHg end of scale and selection time of 10 seconds. Road test the vehicle (sticking to the speed limits in force) as follows: with a motorway journey: let the vehicle reach 2500 rpm in 4th gear; initiate the acquistion by pressing start on the diagnostic equipment and about 2 seconds later fully depress the accelerator pedal until the engine speed is 3500 rpm; once this speed is reached completely release the accelerator pedal; display the resulting graph and in the pressure constant section, with the exception of the initial peak, the reading should be 1900 -2080 mbar (1444 -1581 mmHg) corresponding to a supercharging value of 900 -1080 mbar. during an out of town journey at a fast speed: let the vehicle reach 2500 rpm in 3rd gear; initiate the acquistion by pressing start on the diagnostic equipment and about 2 seconds later fully depress the accelerator pedal until the engine speed is 3500 rpm; once this speed is reached completely release the accelerator pedal; display the resulting graph and in the pressure constant section, with the exception of the initial peak, the reading should be 1900 -2080 mbar (1444 -1581 mmHg) corresponding to a supercharging value of 900 -1080 mbar.

 

[Benimardriver]

Excellent thanks for help and that info . I would like to find one of those tools any idea where ? I only purchased hand held digital pressure gauge

 

[Communicator]

Excellent thanks for help and that info . I would like to find one of those tools any idea where ? I only purchased hand held digital pressure gauge

I think that the tool referred to will be an expensive piece of specialist garage equipment, possibly costing £££, and uneconomic for private use, even if available.

 

[Benimardriver]

I think that the tool referred to will be an expensive piece of specialist garage equipment, possibly costing £££, and uneconomic for private use, even if available.

I agree . Just driven after reconnecting the actuator to the bypass lever and back to its old impressive 2.8jtd pulling power

 

[Communicator]

Excellent thanks for help and that info . I would like to find one of those tools any idea where ? I only purchased hand held digital pressure gauge

As an afterthought, you could probably use the popular Multiecuscan software, with interface + cables. It would be potentially capable of a wide range of other tasks, but to some extent that would depend on what options are fitted to your vehicle.